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chrome/common/extensions/docs/server2/rietveld_patcher.py

Index: chrome/common/extensions/docs/server2/rietveld_patcher.py
diff --git a/chrome/common/extensions/docs/server2/rietveld_patcher.py b/chrome/common/extensions/docs/server2/rietveld_patcher.py
index 941fda4b5a62d5e9ae7f0fc9c0cc932eace52b83..aa668f3857528e03b51a5e2901fd4350b14c0272 100644
--- a/chrome/common/extensions/docs/server2/rietveld_patcher.py
+++ b/chrome/common/extensions/docs/server2/rietveld_patcher.py
@@ -52,8 +52,8 @@ class RietveldPatcher(Patcher):
       raise RietveldPatcherError('Cannot parse issue %s.' % self._issue)
 
     if not issue_json.get('base_url') in _CHROMIUM_REPO_BASEURLS:
-      raise RietveldPatcherError('Issue %s\'s base url is unknown.' %
-          self._issue)
+      raise RietveldPatcherError('Issue %s\'s base url (%s) is unknown.' %
+          (self._issue, issue_json.get('base_url')))
 
     return str(patchsets[-1])